Horseshoe calk



June 7,1932- A. R. SWANSTROM HORSESHOE CALK Filed NOV. 19, 1950 Y INVENTOR ARTH UR R$MN5TROM {2, E! (n-:4

' ATTORNEYf) Patented June 7, 1932 warren STATES PATENT: "oFF'IcL ARTHUR R. SWANSTROM, OF DULUTH, MINNESOTA, ASSIGNOR TO DIAMOND CALK AND 5,13:

HORSESHOE 00., OF DULUTH, MINNESOTA, A CORPORATION OF MINNESOTA HOBSESHOE GALK Application filed November 19, 1930. Serial No. 496,652.

This invention relates to improvements in horseshoe calks of the type which is readily detachable from the horseshoe.

The principal object of the invention is to provide a horseshoe calk comprising a resilient pad member and a securing member which is firmly united to the pad to form a rigid structure which may be inserted into or removed from a horseshoe as a unit.

A further object of the invention is to provide a calk of the character set forth including a securing member provided with an anchoring portion securely and completely embedded in a resilient pad, the said anchoring portion being provided with apertures through which portions of the resilient pad pass so that the anchoring portions and pad are firmly united.

Other objects of the invention and the ad- J vantages thereof will more fully appear as the description proceeds.

The accompanying drawing is submitted for the purpose of illustration of practical embodiments of the invention, it being under- -.I stood, however, that further modifications may be made without departing from the scope of the invention as defined in the appended claims.

In the drawing: Fig. 1 is a plan view of a horseshoe showing calks of my invention secured thereto; Fig. 2 is a view in side elevation of Fig. 1; Fig. 3 is a plan view of a securing member;

Fig. 4 is a view in cross-section taken on line 44 of Fig. 1; i

Fig. 5 is a view partly in elevation and partly in section of a modified form of securing member;

Fig. 6 is a view similar to Fig. 5 showing another modification of the securing member;

Fig. 7 is a View like Figs. 5 and 6 showing a further modification of the securing member;

Fig. 8 is a plan view of a it'urther modified;

form of securing member; I v V Fig. 9 is a sectional View showing the securing member of Fig. 8 in position in a resilient pad; and

Fig. 10 is a view in side elevation similar to Fig. 2 showing a horseshoe provided with a double calk at the heel instead of two single calks as shown in Fig. 2. 7

Referring now to the drawing, the reference numeral 11 indicates a horseshoe which may be of any well-known and desired construction. The toe of the shoe is provided with calks 12 which may be single units or united by a web 13, as maybe desired.

The heel portions of the shoe are provided with integral bosses 14 having tapering apertures 15 into which the calks of my invention are inserted, as best shown in Fig. 4.

The calk of my invention comprises two parts: a resilient pad member indicated by the reference numeral 16 and a securing member designated 17.

The securing member 17 comprises a shank portion 18 and an outwardly flared anchoring portion 19. As shown in the drawing, the shank portion 18 is tapered to fit in the tapering apertures inthe horseshoe so that the calk is firmly wedged into the shoe. It will be understood, however, that I do not limit myself to the type of structure in which the calk is wedged into the, shoe; for example, the apertures 15 may beinternally threaded and the shank portion 18 of the securing member may also be threaded so that it can be screwed into the shoe.

The anchoring portion 19 of the securing member is shown in the drawing to be of circular form but it is to be understood that any other shape may be used. lVhile in my invention the securing member and the pad are firmly united, as will hereinafter appear, it may nevertheless, be desired to make the anchoring portion of non-circular form to provide additional safeguard against rotation of the pad with respect to the securing member. lWIoreover, the outwardly flared anchoring portion may be dished or concave as clearly shown in Figs. 4 and 5 to lend rigidity to the structure and to increase the surface contact between the pad and the anchoring portion. As shown in Fig. 4, the bottom of the shank 18 may be concave as at 20, this being accomplished by grinding or by any other convenient method. This formation of the bottom of the shank will also increase the contact surface of the shank and? theresilient pad.

The anchoring portion 19 is provided with a plurality of apertures 21 suitably spaced around the said anchoring portion. apertures, preferably and as shown, have tapering walls.

In constructing the calks of my invention it will. be understood that the securing memher is assembled in the mold with the resilient pad which is preferably of rubber or suitable composition having the characteristics of rubber.

be practically impossible for the pad to. be;

separated from the securing member.

Figs. 5, 6 and 7 showmodifications of the securing member which may be adopted in lieu of the form. shown in- Figs; 3 and 4. Fig. 5 the anchoring portion is provided with a peripheral bead or flange 22, which adds rigidity to the structure and also serves to strengthen the bond between the resilient pad and the securing member.. In Fig. 6 the anchoring portion is shown to be flat instead of concave as shown in Figs. 4 and 5. InFig. 7 the anchoring portion 19 is provided with a peripheral flange'23 which, in the instance selected for illustration, is turned downward.- ly with respect to the anchoring portion. It will be understood, of course, that this flange might be turned upwardlyif desired, or that both types of flanges might be provided simultaneously. In. either case the addition of the flange adds rigidity to the structure and makes more secure the union between the anchoring portion and the resilient-pad.

In the preferred embodiment and the modifications thus far described, the anchoring portion is completely embedded in the resili ent pad. A departure from thistype of. construction is illustrated in Fig; 8 wherein I have shown a securing member of the type illustrated in Fig. 6 which is provided with a plurality of integral extensions 24 projecting radially from the periphery of the anchoring portion and terminating in downwardly bent flanges 25 exposed at the exterior surface of These As will be clear from an inspection of Fig. 4;, portions of the resilient the resilient pad 16. The provision of the extensions 24: has the effect of making the anchoring portion non-circular and thus provides against the possibility of rotation of the pad with respect to the anchoring portion. It will be understood that extensions similar to the extensions 24- may be provided on the anchoring portions of the other securing members heretofore described.

I have thus far described my invention as applied to the construction of a single calk. It is obviousthat this construction. is also applicable to a double calk, as shown in Fig. 10. In this figure the reference numeral 26 indicates aresilient pad member which is provided with two securing members (not shown) of the same type as that heretofore described. In other words, the double calk is the equivalent of. two single calks united together.

It will be seen, therefore, that I haveprovided a horseshoe calk of simple and rigid construction which is readily attachable to standard horseshoes, as a unit. The calk comprises a resilient pad of rubber or the like which is firmly united toa securing memberwhich has a shank removably engageable withv a horseshoe. The principal feature of the in,- vention resides in the provision of an anchoring portion on the securing member which is apertured so that portions of the resilient pad. may pass therethrough thus permanently and rigidly uniting the two parts of thecalks.

I claim as my invention:

1. A padded horseshoe calk comprising a securing member having ashank adapted to be secured to a horseshoe. an anchoring-portion on said shank. a: resilient pad surrounding said anchoring'portion, and an extension on said anchoring portion having-aflange'terminating at the exterior surface of said pad.

2. A padded horseshoe calk comprising a securing member having a shank adapted to be secured to a horseshoe. an anchoring portion on said shank, a resilient pad surrounding said anchoring portion, and a plurality of radial extensions on said anchoring portion terminating at the exterior surface of saidpad.

3. A padded horseshoe calk comprising a securing member having. a shank adapted. to be secured to a. horseshoe, an anchoring portion on said shank, a resilient pad surrounding said anchoring portion, and a pluralityof radial extensions on said anchoring portion having, flanges terminating at the exterior surface of said pad.

4. A padded horseshoe calk comprising a securing member having a shank adapted to be secured to a horseshoe, an apertured anchoring portion on said shank, a resilient pad. surrounding said. anchoring POI'JGIOID and passing through said apertures, and a radial extension on said anchoring portion terminating at the exterior surface of said pad.

5. A padded horseshoe calk comprising a securing member having a shank adapted to be secured to a horseshoe and an outwardly flared anchor provided with apertures, and a resilient pad surrounding said anchor and having portions passing through said apertures, said shank having a concavity in its lower end to receive a portion of said resilient pad. I

In Witness whereof, I have hereunto set my hand this 14th day of November 1930.

15 ARTHUR R; SWANSTROM. 

